Which of Bohr's assumptions in creating the "Bohr atom" was revolutionary (unclassical)?
What will be an ideal response?
that angular momentum was quantized: mvr = n(h/2?); also radiates only when making transition to another orbit
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A 2.50 A current is carried by a copper wire of radius 1.0 mm. If the density of conduction electrons is 
what is the drift velocity of the conduction electrons?
A. 
B. 
C. 
D. 
E. 
Briefly explain why NASA chose Gale Crater as target site of exploration for Curiosity
What will be an ideal response?
A rock is suspended from a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25 N.What is the density of the rock?
A) 2.00 times the density of water B) 2.33 times the density of water C) 2.67 times the density of water D) 3.00 times the density of water E) 2.50 times the density of water
A beam of unpolarized light shines on a set of three polarizers as shown in the figure (imagine them stacked as a-b-c). The amount of light transmitted through them is
A. zero. B. less than zero. C. more than zero.